17T&R.AR.Y 

UNIVERSITY: 
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AGRICULTURE 


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UNIVERSITY  OF  ILLINOIS 

Agricultural  Experiment  Station 


BULLETIN  No.  280 


CROP  YIELDS  FROM  ILLINOIS  SOIL 
EXPERIMENT  FIELDS  >IN  1925 

BY  F.  C.  BAUER 


URBANA,  ILLINOIS,  AUGUST,  1926 


Location  of  Experiment  Fields  from  Which  Data 
are  Presented  in  this  Bulletin 


CROP  YIELDS  FROM  ILLINOIS  SOIL 
EXPERIMENT  FIELDS  IN  1925 

BY  F.  C.  BAUER,  Chief  Soil  Experiment  Fields 

The  ILLINOIS  AGRICULTURAL  EXPERIMENT  STATION  for  a  number 
o'f  years  has  conducted  field  investigations  in  all  parts  of  the  state  to 
test  the  effectiveness  of  various  soil  treatments  on  yields  of  farm  crops. 
The  complete  results  from  all  these  fields  up  to  and  including  1924  are 
reported  in  Bulletin  273.  It  is  the  purpose  to  keep  this  record  up  to 
date  with  the  publication  each  year  of  the  current  results.  The  pres- 
ent bulletin  is  in  the  nature  of  such  an  annual  supplement,  giving  the 
1925  crop  yields  for  the  major  investigations  conducted  on  these  fields. 

In  both  these  publications  the  figures  are  presented  as  a  matter  of 
record,  without  comment  or  discussion.  In  a  broad  way,  of  course, 
the  results  speak  for  themselves  and  carry  certain  definite  lessons  to 
those  who  have  been  following  the  soil  investigations  of  the  Station. 
Discussions  of  these  investigations  have  appeared  from  time  to  time 
in  former  Station  publications,  and  further  discussions  of  an  interpre- 
tative nature  will  appear  in  future  publications. 

The  results  reported  in  the  following  tables  are  for  the  individual 
fields  arranged  alphabetically,  rather  than  by  location  or  by  soil  types. 
The  location  of  these  fields  in  the  state  can  be  ascertained  by  referring 
to  the  accompanying  map. 

All  yields,  except  those  in  parentheses,  indicate  bushels  an  acre. 
Parentheses  are  used  to  denote  tons  of  hay. 

EXPLANATION  OF  SYMBOLS 

In  some  of  the  following  tables  symbols  have  been  used  instead  of 

words,  to  indicate  soil  treatments: 

R=Residues,  consisting  of  cornstalks  and  straw  in  some  cases.     In  addition,  a 
green  manure  crop  of  biennial  sweet  clover  is  seeded  in  small  grain,  usually 
wheat,  and  the  spring  growth  is  plowed  under  for  corn.     On  plots  without 
limestone  this  sweet  clover  survives  on  only  a  few  of  the  fields. 
L=Limestone,  applied  in  amounts  sufficient  to  grow  clovers  and  alfalfa. 

rP— Rock  phosphate  K=Potassium  salts 

aP=Acid  phosphate  M=Stable  manure 

bP=Bone  meal  O=Check  plot 

sP— Slag  phosphate 


159 


160 


BULLETIN  No.  280 


[August, 


TABLE  1.— ALEDO  FIELD 


Serial 
plot                       Soil  treatment 
No. 

Series       Series       Series       Series 
100           200          300          400 
Wheat       Oats        Corn        Corn 

1     None  

24.2         54.4         79.4        65  0 

2     Manure  

.     24.3         65  0       101  4        88  2 

3     Manure,  lime  

.     25.0         68.4       101  8         95  6 

4     Manure,  lime,  rock  phosphate  

.     35.8        70.3       106  6       101  2 

5     None  

19.3        60.4        83.0        73.4 

6     Residues  

.      19.5         72.5         83.8         83.8 

7     Residues,  lime  

.     26.2         75.0         86.6         83.4 

8     Residues,  lime,  rock  phosphate  

.     40.2         78.1         92.8        87.4 

9     Residues,  lime,  rock  phosphate,  kainit. 
10    None  

.     43.5         81.3         96.4       102.4 
.     18.7        67.8        76.8        72.6 

TABLE  2.  —  ALEDO  FIELD:  COMPARATIVE  PHOSPHATE  EXPERIMENT 

Serial        Series  500                 Series  600 

•  Series  700                 Series  800 

plot       Soil                          Soil 
No.   treatment     Oats    treatment      Oats 

Soil                            Soil 
treatment     Oats     treatment     Oats 

1     R..             ..63  9     R..             .   64  4 

R  66.6     R..             ..45.0 

2     RbP     ..    .   75  0     RaP  ..      .  .76  1 

RrP  70.3     RsP  663 

3     RLbP  734     RLaP  781 

RLrP  67  8     RLsP   .  .      .66  7 

4     RL  64  5     RL.      .         64  1 

RL  .      .         66  3     RL  .  .             53  9 

TABLE  3.—  CARLINVILLE  FIELD 

Serial 
S'ot                          Soil  treatment 
0. 

Series       Series       Series       Series 
100          200          300          400 
Oats       Wheat     Clover-     Corn 
alfalfa 

1     None  ."  

28.9         18.1       (1.04)       58.1 

2     Manure  

.     39.5        28.6       (2.12)       71.6 

3     Manure,  lime  

.     47.0         34.3       (5.11)       75.2 

4     Manure,  lime,  rock  phosphate  

.     44.8        34.9       (6.43)       71.0 

5     None  

27.0        22.9       (2.49)       57.6 

6     Residues  

.     33.9        22.6       (2.39)       60.6 

7     Residues,  lime  

.     55.9        27.3       (4.54)       59.8 

8    Residues,  lime,  rock  phosphate  

.     57.0        34.5       (5.64)       59.9 

9     Residues,  lime,  rock  phosphate,  kainit  .  . 
10     None  

51.3        36.4       (6.28)       76.1 
.     27.5         19.9       (2.24)       60.5 

1926} 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


161 


TABLE  4.— CARTHAGE  FIELD 


Serial 
plot                         Soil  treatment 
No. 

Series 
100 
Clover 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1     None  

(2.32) 
(2.64) 
(3.12) 
(3.22) 

(2.33) 
(2.62) 
(2.81) 
(3.11) 

(3.16) 
(2.13) 

28.8 
43.9 
60.0 
60.6 

34.1 
36.9 
60.0 
65.5 

66.4 
34.2 

28.8 
44.5 
65.3 
90.9 

32.3 
94.6 
101.2 
103.1 

103.8 
46.4 

21.7 
32.7 
33.4 
35.1 

18.5 
19.4 
30.8 
33.0 

39.0 
24.9 

2     Manure  

3     Manure,  lime  

4     Manure,  lime,  rock  phosphate  

5     None  

6    Residues  

7     Residues,  lime  

8     Residues,  lime,  rock  phosphate  

9     Residues,  lime,  rock  phosphate,  kainit  .  .  . 
10    None  

TABLE  5.—  CARTHAGE  FIELD:  GYPSUM  EXPERIMENT 

Serial 
plot                          Soil  treatment 
No. 

Series 
500 
Corn 

Series  600 

Series 
700 
Corn 

Oats 

Stubble 
clover 

1     Residues,  lime  

72.8 
93.0 

89.8 
97.0 

86.8 
99.4 

89.2 
81.6 

41.6 
44.7 

45.3 
45.6 

45.3 
45.3 

48.1 
40.9 

(2.03) 
(1.05) 

(1.10) 

(1.07) 

(   .85) 
(   .77) 

(   -73) 
(   .94) 

76.0 
69.8 

65.0 
65.2 

57.2 
71.4 

60.8 
68.4 

2     Residues,  lime,  rock  phosphate  (100)  .... 
3     Residues,  lime,  rock  phosphate  (100), 
gypsum  (100)  

4     Residues,  lime,  rock  phosphate  (200)  .... 
5     Residues,  lime,  rock  phosphate  (200), 
gypsum  (200)  

6     Residues,  lime,  rock  phosphate  (400)  .... 
7     Residues,  lime,  rock  phosphate  (400), 
gypsum  (400)  

8     Residues,  lime  

TABLE  6.—  CLAYTON  FIELD 

Serial                                                        Series 
plot                  Soil  treatment                     100 
No.                                                         Clover 

Series 
200 
Oats 

Series 
300 
Corn 

Series  400 
Stubble 
Wheat     clover 

1     None  (1.37) 

45.2 
61.1 
68.1 
68.3 

46.7 
45.2 
62.2 
69.4 

69.7 
46.7 

37.7 
71.4 
92.8 
94.9 

49.9 
68.5 
104.9 
105.5 

103.9 
44.4 

6.5 
8.6 
16.7 
16.1 

7.8 
8.0 
13.4 
14.3 

21.1 

8.9 

(   .54) 
(   -60) 
(1-35) 

(1.56) 

2     Manure  (1.69) 

3     Manure,  lime  (2.76) 

4     Manure,  lime,  rock  phosphate  .  .    (2  .  86  ) 
5    None  (1.36) 

6     Residues  (1.15) 

7     Residues,  lime  (1  .  41  ) 

8     Residues,  lime,  rock  phosphate  .    (1  .  66) 

9     Res.,  lime,  rock  phos.,  kainit  ...    (1  .  88) 
10     None  (1.42) 

162 


BULLETIN  No.  280 


[August, 


TABLE  7.— DIXON  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series       Series 
100           200 
Clover       Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1 
2 
3 

4 

5 
6 

7 
8 

9 
10 

None                                     

(2.29) 
.    (2.34) 
(2.25) 
(2.30) 

.    (2.10) 
.    (1.02) 
.    (1-21) 
.    (1.64) 

.    (1.80) 

.    (2.13) 

45.0 
60.6 
75.3 
70.0 

50.3 
52.2 
55.9 
71.9 

76.3 
45.9 

55.8 
85.0 
87.6 
92.6 

63.0 
64.0 
79.6 
81.0 

81.2 
66.4 

10.7 
25.2 
35.2 
38.0 

14.3 
21.3 
29.2 
36.0 

38.5 
12.0 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate  

None  

Residues       

Residues,  lime  

Residues,  lime,  rock  phosphate  

Residues,  lime,  rock  phosphate,  kainit  .  . 
None  

TABLE  8.—  ELIZABETHTOWN  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Wheat 

Series 
200 
Corn 

Series 
300 
Wheat 

Series 
400 
Clover- 
timothy 

1 
2 
3 
4 

5 
6 

7 
8 

9 
10 

None  

4.8 

1.7 
5.2 
32.1 
51.7 

3.4 
17.4 
53.1 
68.5 

69.6 
30.5 

11.5 
5.3 
25.7 
29.2 

1.3 
1.4 
14.8 
25.1 

30.2 
9.4 

(   -36) 
(   .31) 
(1.01) 

(1.22) 

(   .20) 

(   .26) 
(   .79) 
(   -72) 

(1.09) 
(   -16) 

Manure  

5.1 

Manure,  lime  

7  4 

Manure,  lime,  rock  phosphate  

11  3 

None  

1.3 

Residues  

1.1 

Residues,  lime  

7.3 

Residues,  lime,  rock  phosphate  

.     14.0 

Residues,  lime,  rock  phosphate,  kainit. 
None  

15.1 

5  8 

TABLE  9—  ENFIELD  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Clover- 
timothy 

Series 
200 

Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1 
2 
3 

4 

5 
6 

7 
8 

9 
10 

None  

.    (0.00) 

10.5 
21.9 
26.7 
24.4 

11.9 
13.3 

22.8 
23.1 

27.3 

18.1 

10.8 
17.8 
35.0 
33.7 

11.7 
15.9 
26.2 
34.4 

38.6 
17.1 

12.2 
19.1 
31.8 
27.9 

14.2 
14.9 
28.6 
30.8 

31.8 
15.8 

Manure  

.    (0.00) 

Manure,  lime  

.    (1.07) 

Manure,  lime,  rock  phosphate  

.    (1.19) 

None  

.    (0.00) 

Residues  

.    (0.00) 

Residues,  lime  

.    (  .76) 

Residues,  lime,  rock  phosphate  

.    (1  00) 

Residues,  lime,  rock  phosphate,  kainit  . 
None  

.    (1.29) 
.    (0  00) 

1926] 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


163 


TABLE  10.— EWING  FIELD 


Serial 
plot                         Soil  treatment 
No. 

Series 
100 
Clover- 
timothy 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1     None  

.    (   -32) 
.    (   .38) 
.    (1.42) 
(1.42) 

.    (  .38) 

.    (   -46) 
.    d.24) 
,    (1-22) 

(1.38) 
.    (   -42) 

15.0 
20.5 
49.7 
53.8 

13.8 
12.7 
41.3 
34.7 

52.8 
14.7 

14.1 
26.1 
46.5 
52.3 

14.2 
'21.2 
38.9 
50.3 

59.5 
16.4 

8.8 
11.9 
41.7 
39.2 

10.8 
13.6 
37.3 
46.0 

49.3 
8.9 

2     Manure  

3     Manure,  lime  

4     Manure,  lime,  rock  phosphate  

5     None  

6    Residues  

7     Residues,  lime  

8    Residues,  lime,  rock  phosphate  

9     Residues,  lime,  rock  phosphate,  kainit  .  . 
10    None  

TABLE  11.—  HARTSBURG  FIELD 

Serial 
plot                           Soil  treatment 
No. 

Series 
100 
Wheat 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Corn 

1     None  

33.5 
33.3 
29.2 
33.5 

24.8 
31.7 
23.3 
30.5 

33.2 
30.3 

36.3 
44.4 
44.1 
44.4 

42.8 
44.1 
41.3 
42.2 

42.5 
40.6 

44.0 
65.0 
77.2 
71.4 

59.6 
68.6 
71.4 

74.8 

73.8 
55.2 

43.8 
58.0 
66.2 
65.0 

50.0 
79.6 

87.8 
88.4 

82.8 
49.2 

2     Manure  

3     Manure,  lime  

4    Manure,  lime,  rock  phosphate  

5     None  

6     Residues  

7     Residues,  lime  

8     Residues,  lime,  rock  phosphate  

9     Residues,  lime,  rock  phosphate,  kainit  .  . 
10     None."  

TABLE  12.—  JOLIET  FIELD 

Serial                                          Series      Series 
plot          Soil  treatment             100          200 
No.                                          Alfalfa     Wheat 

Series 
300 
Clover 

Series 
400 
Oats 

Series 
500 
Corn 

Series 
600 
Corn 

10....                              (     82)       10  3 

(   .49) 
(   .63) 
(   -90) 
(1-13) 

(  .35) 
(   -53) 
(   .57) 
(1.41) 

(1.37) 
(   .39) 

30.2 
39.1 
38.8 
50.5 

36.1 
41.7 
44.8 
53.9 

53.8 
30.9 

34.6 
39.0 
49.9 
54.3 

38.4 
40.4 

44.8 
50.4 

'56.2 
35.6 

42.5 
55.1 
56.5 
56.6 

46.8 
54.1 
53.9 
55.0 

56.9 
45.0 

2     M  (1.44)       10.7 

3     ML  (2.36)       16.2 

4     MLrP  (3.29)       24.4 

50...                                  (     55)        8  0 

6    R  (   .67)        7.9 

7     RL  (1.74)       14.8 

8    RLrP  (3.61)       31.8 

9    RLrPK..                     .    (3.46)       39.2 

10     0  (   .54)       22.0 

164 


BULLETIN  No.  280 


[August, 


TABLE  13.— KEWANEE  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Clover 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1 

2 
3 

4 

5 
6 

7 
8 

9 
10 

None  

(  -97) 
(1-54) 
(1.51) 
(1.61) 

(1.31) 
(   .60) 
(   .79) 
(1.00) 

(1.05) 
(1.79) 

55.0 
75.8 
76.4 
69.7 

50.9 
58.4 
63.6 
74.7 

73.9 
49.1 

56.8 
70.8 
73.0 
80.4 

59.1 
61.8 
68.0 
82.6 

77.7 
56.2 

23.4 
24.0 
24.4 
35.9 

20.1 
23.4 
29.2 
35.9 

35.0 
27.4 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate  . 

None  

Residues  

Residues,  lime  

Residues,  lime,  rock  phosphate 

Residues,  lime,  rock  phosphate, 
None  

kainit.  . 

TABLE  14.—  LAMOILLE  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Wheat 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Corn 

1 
2 
3 

4 

5 
6 

7 
8 

9 

10 

None  

44.3 
45.5 
44.1 
45.6 

37.0 
47.5 
49.3 
50.1 

47.2 
34.3 

88.0 
90.9 
80.9 
76.4 

68.3 
73.8 
73.3 

73.8 

68.1 

58.1 

40.1 
64.3 
64.6 
64.8 

54.0 
63.6 
69.5 
75.5 

78.6 
39.0 

40.8 
64.1 
69.4 
72.4 

58.8   - 
64.3 
64.5 
67.0 

67.9 
47.3 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate  . 

None  

Residues  

Residues,  lime  

Residues,  lime,  rock  phosphate 

Residues,  lime,  rock  phosphate, 
None  

kainit.  . 

TABLE  15.—  LEBANON  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series  100 
Wheat    Stubble 
clover 

Series 
200 
Soybeans 

Series 
300 
Corn 

Series 
400 
Wheat 

1 
2 
3 
4 

5 
6 

7 
8 

9 
10 

None  

12.4 
19.8 
23.9 
25.3 

14.3 

17.8 
27.4 
24.4 

24.6 
13.3 

(0.00) 
(   -33) 
(  .87) 
(  .93) 

(0.00) 
(0.00) 

(   .74) 
(   .83) 

(1.18) 
(0.00) 

(   -99) 
(1.84) 
(1.98) 
(1.86) 

(1.02) 
(1.04) 
(1.43) 

(1-51) 

(1.87) 
(1.41) 

30.9 
53.0 
65.6 
62.9 

23.1 

48.8 
75.9 
84.7 

78.3 
40.6 

26.2 
33.1 
30.9 
41.0 

28.5 
30.9 
38.8 
39.7 

43.2 
29.2 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate.  . 
None  

Residues  

Residues,  lime  

Residues,  lime,  rock  phosphate  . 

Res.,  lime,  rock  phos.,  kainit  .  .  . 
None  

1926] 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


165 


TABLE  16.— McNABB  FIELD 


Serial 
plot                          Soil  treatment 
No. 

Series 
100 
Oats 

Series 
200 
Corn 

Series 
300 
Soybeans 

Series 
400 
Wheat 

1     Residues  

75.0 

70.8 
75.6 
69.0 

77.2 
72.6 

(1.50) 
(1.08) 
(1.15) 
(1.48) 
(1.34) 

26.7 
34.0 
28.3 
36.8 
29.2 

2     Residues,  rock  phosphate  

81.9 

3     None  

81  6 

4     Manure,  rock  phosphate  

87  8 

5     Manure  

84.1 

TABLE  17.—  MINONK  FIELD 

Serial 
plot                          Soil  treatment 
No. 

Series 
100 
Wheat 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Corn 

1     None  

29.2 

65.3 

68.6 
66.1 
65.6 

66.6 
71.6 
68.6 
66.4 

70.3 
57.3 

60.1 
70.5 
73.5 
77.3 

49.1 
63.7 
61.4 
66.2 

61.6 
31.8 

42.2 
68.7 
68.8 
74.4 

43.9 
58.9 
74.4 
71.0 

70.9 
43.2 

2     Manure  

28  3 

3     Manure,  lime  

29.8 

4     Manure,  lime,  rock  phosphate  . 

28.3 

5     None  

29.2 

6     Residues  

37.7 

7     Residues,  lime  

30.2 

8     Residues,  lime,  rock  phosphate  . 

30.0 

9     Residues,  lime,  rock  phosphate,, 
10     None  

kainit.  .     25.5 
16.2 

r 
TABLE  18.—  MT.  MORRIS  FIELD 

Serial 
plot                          Soil  treatment 
No. 

Series 
100 
Clover 

Series 
200 

Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1     None  

.    (1.73) 

55.2 
72.0 

88.8 
84.2 

53.3 
69.1 
94.7 
90.9 

97.2 
51.1 

65.9 
74.6 
79.9 
85.9 

58.8 
63.8 
85.4 
87.0 

91.0 
50.1 

19.4 
28.0 
42.2 
44.5 

20.9 
23.3 
36.8 
42.5 

42.5 
21.8 

2     Manure  

(2.13) 

3     Manure,  lime  

(2.26) 

4     Manure,  lime,  rock  phosphate.  . 

(2.15) 

5    None  

.    (1.99) 

6    Residues  

(   .74) 

7     Residues,  lime  

(   .82) 

8     Residues,  lime,  rock  phosphate  . 

(   .82) 

9     Residues,  lime,  rock  phosphate, 
10    None  

kainit.  .    (   .86) 
(2.13) 

166 


BULLETIN  No.  280 


[August, 


TABLE  19.— NEWTON  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series 
100 

Soybeans 

Series 
200 
Corn 

Series 
300 
Wheat 

Series 
400 
Corn 

1 
2 
3 

4 

5 
6 

7 
S 

•9 
10 

None.  .  .  . 

(1:43) 
(1.48) 
(2.05) 
(2.13) 

(1.33) 
(1.13) 
(1.60) 
(2.03) 

(1.90) 
(1.10) 

6.8 
16.0 
34.2 
36.8 

6.6 
10.8 
31.4 
30.2 

37.0 

2.8 

.5 
0.0' 
12.3 
19.2 

.5 
.3 
11.3 
15.0 

24.0 
.5 

4.6 
15.2 
28.2 
19.0 

5.0 

5.8 
4.2 
1.2 

0.0 
2.8 

Manure  . 

Manure,  1 
Manure,  1 

None 

ime  

ime,  rock  phosphal 

p 

Residues 
Residues, 
Residues, 

Residues, 
None.  .  .  . 

lime  

lime,  rock  phosphs 
lime,  rock  phosph* 

ite 

ite,  kainit  .  .  . 

TABLE  20.—  NEWTON  FIELD:  LIME  EXPERIMENT 

High-calcium  lime 

Dolomitic  lime 

Serial                      Limestone 
plot         Soil           fineness 
No.   treatment      (meshes 
per  inch) 

Series 
500 
Corn 

Series 
700 
Sweet 
clover 

Series 
900 
Wheat 

Series 
600 
Corn 

Series 
800 
Sweet 
clover 

Series 
1000 
Wheat 

1 
2 
3 
4 
5 
6 

$ 
8 
9 
10 
11 
12 

13 
14 
15 
16 
17 
18 
19 

RrPK 
RrPKL 
RrPKL 
RrPKL 
RrPKL 
RrPKL 

RrPK 
RrPKL 
RrPKL 
RrPKL 
RrPKL 
RrPKL 

RrPK 
RrPKL 
RrPKL 
RrPKL 
RrPKL 
RrPKL 
RrPKL 

17. 
24. 
20. 
19. 
11. 
2. 

3. 
10. 
10. 
17. 
20. 
23. 

10 
33 
32 
.     29 
,     24 
23 
14 

6 
8 
0 
6 
6 
6 

8 
2 

2 
6 
6 
2 

0 
2 

8 
2 
0 

,4 
,4 

0.00 
1.23 
1.63 
1.40 
1.45 
1.25 

0.00 
1.57 
1.32 
1.40 
1.92 
2.60 

0.00 
3.07 
2.70 
2.47 
2.27 
3.07 
0.00 

4.2 
4.5 
6.5 
7.0 
9.5 
9.3 

3.5 
8.7 
8.2 
5.3 
5.3 
5.5 

4.5 
5.7 
6.0 
8.2 
8.0 
12.5 
6.3 

22.6 
28.2 
42.4 
14.0 
0.0 
0.0 

0.0 
0.0 
0.0 
0.0 
0.0 
1.2 

2.4 
9.8 
13.6 
12.0 
15.4 
17.0 
28.8 

0. 
1 
1, 
1 
1 
1, 

0 
1 
1 
1 
1 
1 

0 

1 
1 

2 
1 
2 
0 

00 
13 
43 
32 
13 
02 

00 
.48 
30 
35 
40 
57 

.00 
.75 
.52 
,38 
92 
.67 
00 

5.2 
8.0 
9.3 
10.5 
10.2 
11.8 

8.2 
13.0 
12.8 
12.3 
8.0 
6.5 

3.0 
8.2 
13.8 
14.0 
10.3 
15.3 
9.7 

4  down  
4  to  10.  .  .  . 
10  down  .  .  . 
50  down  .  .  , 
Burnt  

4  down  
4  to  10.... 
10  down  .  .  , 
50  down.  .  , 
Burnt  

4  down  
4  to  10.... 
10  down.  . 
50  down  .  . 
Burnt. 

Note. — Limestone  is  applied  to  Plots  2  to  6  at  the  rate  of  500  pounds  an  acre 
a  year;  to  Plots  8  to  12  at  the  rate  of  1,000  pounds;  and  to  Plots  14  to  19  at  the  rate 
«f  2,000  pounds. 


1926} 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


167 


TABLE  21.— OBLONG  FIELD 


Serial 
plot 
No. 


Soil  treatment 


Series       Series       Series       Series 

100          200          300          400 
SoybeansSoybeans    Corn      Wheat 


1  None (   .94) 

2  Manure. (   .95) 

3  Manure,  lime (1.02) 

4  Manure,  lime,  rock  phosphate (1 . 52 ) 

5  None (.82) 

6  Residues (.91) 

7  Residues,  lime (1 .36) 

8  Residue,  lime,  rock  phosphate (1 .39) 


9 
10 


Residues,  lime,  rock  phosphate,  kainit.  . 
None.  . 


(1.62) 
(   -80) 


(1.73) 
(1.68) 
(3.35) 
(3.25) 

(1.13) 

(1.23) 
(3.09) 
(3.03) 

(3.45) 
(2.56) 


12.6 
32.8 
50.2 
49.2 

24.4 
30.2 
38.6 
47.2 

58.8 
26.0 


1.8 

4.8 

22.0 

24.7 

4.0 

8.7 

18.5 

26.3 

32.7 
6.5 


TABLE  22.— ODIN  FIELD 


Serial 

Series 

Series       Series       Series 

plot                         Soil  treatment 

100 

200          300           400 

No. 

Sweet 

Corn    Soybeans  Wheat 

clover 

Land  Not  Tile-drained 


1 

None  

.44 

23  1 

(     96) 

6  3 

2 

Residues  

24 

31  9 

(     98) 

10  7 

3 

Residues,  lime  

.     1.44 

26.6 

(1.34) 

26.1 

4 

Residues,  lime,  bone  meal 

93 

24  8 

(1  19) 

27  1 

5 

Res.,  lime,  bone  meal,  potas.  sulfate.  .  . 

.     2.28 

43.7 

(1-52) 

27.5 

Land  Tile-drained 


6 

None  

0  00 

16 

2 

( 

.74) 

8 

7 

Residues  

.44 

18 

1 

( 

68) 

9 

0 

8 

Residues,  lime  

.     2.53 

09) 

6 

9 

Residues,  lime,  bone  meal  

.     2.24 

31 

6 

(] 

.44) 

?7 

3 

10 

Res.,  lime,  bone  meal,  potas.  sulfate  .  .  . 

.     2.38 

39. 

9 

(1. 

46) 

23, 

7 

TABLE  23. — ODIN  FIELD:  COMPARATIVE  PHOSPHATE  EXPERIMENT 


Serial 
plot 
No. 


Soil  treatment 


Light  lime 

Series       Series 

500          600 
Wheat      Corn 


Heavy  lime 

Series       Series 

700          800 

Wheat      Corn 


1  Residues,  lime,  kainit,  bone  meal 15.2  24 . 0  24 . 2  39 . 8 

2  Residues,  lime,  kainit 8.7  25*8  25.5  42.6 

3  Residues,  lime,  kainit,  acid  phosphate. ..  12.3  30.4  20.8  41.0 

4  Residues,  lime,  kainit,  rock  phosphate ..  14.5  18.0  22.0  42.2 

5  Residues,  lime,  kainit 7.3  15.6  17.3  44.2 

6  Residues,  lime,  kainit,  slag  phosphate ...  14.5  11.6  23.0  44.0 


168  BULLETIN  No.  280  [August, 

TABLE  24. — ODIN  FIELD:  SWEET  CLOVER  ROTATION  EXPERIMENT 


Rotation                      Soil  treatment 

Corn 

Soybeans 

Wheat 

Sweet 
clover 

Three-year     Residues,  lime,  bone  meal 
Four-year       Residues,  lime,  bone  meal 

34.6 

29.7 

(1.25) 
(2.67) 

3.3 

22.2 

2^67 

TABLE  25.—  OQUAWKA  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Corn 

Series 
200 
Alfalfa 

Series 
300 
Rye 

Series 
400 
Soybeans 

Series 
500 

Wheat 

Series 
600 
Soybeans 

1 

2 
3 

4 

5 
6 

7 
8 

9 
10 

0.. 

47.0 
59.8 
73.7 
81.7 

52.8 
44.0 
66.5 
70.4 

68.4 
52.3 

(0.00) 

(   .26) 
(1.07) 
(1.02) 

(   .19) 
(   -33) 
(1.12) 
(  .95) 

(   .84) 
(0.00) 

9.4 
8.2 
9.5 
6.3 

4.1 
5.2 
6.7 
7.6 

10.7 
9.3 

(1.08) 
(1.13) 

(1.18) 
(1-25) 

(1.08) 
(1.13) 
(1.18) 
(1.23) 

(1.05) 
(   .88) 

.5 
4.6 
9.3 
9.5 

3.3 
5.1 

8.3 
8.8 

11.2 
6.7 

(1.23) 
(1.43) 
(2.28) 
(2.15) 

(1.05) 

(1.15) 
(1-88) 
(1,78) 

(1.55) 
(  .75) 

M  

ML  

MLrP  

0.. 

R  

RL  

RLrP...      . 

RLrPK  

0  .    . 

TABLE 

26.—  PALESTINE  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Corn 

Series 
200 

Wheat 

Series 
300 
Sweet 
clover 

Series 
400 
Rye 

Series 
500 
Soybeans 

1 

2 
3 
4 

5 
6 

8 

9 
10 

None  

14.2 
19.0 
12.4 
12.4 

9.2 
10.0 
.4 
.9 

1.8 
11.4 

8.5 
11.0 
15.5 
14.5 

9.8 
11.3 

25.8 
29.8 

26.8 
10.0 

.45 
1.38 
5.78 
7.22 

.28 
1.28 
5.83 
5.33 

4.88 
.55 

15.5 
14.1 
15.2 
16.3 

13.2 
12.9 
18.8 
18.2 

18.4 
13.2 

(    .74) 
(   .85) 
(1.16) 
(1.22). 

(   .95) 
(1.09) 
(1.28) 
(1.28) 

(1.26) 
(1.00) 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate  .  . 
None  

Residues  

Residues,  lime  

Residues,  lime,  rock  phosphate  . 

Res.,  lime,  rock  phos.,  kainit.  .  . 
None  ,  

1926] 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


169 


TABLE  27.— RALEIGH  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Clover- 
timothy 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

1 
2 
3 
4 

5 
6 

7 
8 

9 
10 

None  

.    (0.00) 

12.8 
25.9 
44.7 
46.9 

17.5 
22.5 
32.2 
40.3 

42.5 
15.6 

17.4 
29.0 
33.2 
37.0 

11.8 
20.0 
37.2 
54.0 

52.8 
24.4 

1.8 
7.3 
25.5 
26.7 

3.5 

5.8 
22.0 
26.7 

28.2 
9.2 

Manure  

-    (   -44) 

Manure,  lime  

.    (2  24) 

Manure,  lime,  rock  phosphate  . 

.    (2  37) 

None  

.    (     41) 

Residues  

.    (   .32) 

Residues,  lime  

.    (1.00) 

Residues,  lime,  rock  phosphate. 

.    (1.68) 

Residues,  lime,  rock  phosphate, 
None  

kainit  . 

.    (1.98) 
.    (0.00) 

TABLE  28.—  SIDELL  FIELD 

Serial 
B'ot 
0. 

Soil  treatment 

Series 
100 
Oats 

Series 
200 
Alfalfa 

Series 
300 
Corn1 

Series 
400 
Wheat 

Series 
500 
Clover 

1 
2 
3 

4 

5 
6 

7 
8 

9 
10 

None  

22.5 
25.6 
27.3 
33.6 

14.4 
20.3 

28.9 
36.9 

38.3 
28.1 

(1.10) 

(1.64) 
(3.74) 
(5.56) 

(  .68) 

(1.15) 
(3.68) 

(4.78) 

(5.89) 
(2.02) 

52.7 
51.1 
56.9 
55.8 

24.9 
35.1 
34.2 

48.2 

54.9 
41.1 

37.6 
42.8 
41.3 
42.5 

32.2 
33.0 
30.8 
32.0 

31.3 

25.8 

(1.84) 
(2.27) 
(1.88) 
(2.13) 

(1.26) 
(   .64) 
(  .73) 
(1.17) 

(1.35) 
(1.03) 

Manure  

Manure,  lime  

Manure,  lime,  rock  phosphate  . 
None  

Residues  

Residues,  lime  

Residues,  lime,  rock  phosphate  . 

Res.,  lime,  rock  phos.,  kainit.  .  . 
None  

JManure  was  applied  to  Plot  301  by  mistake  in  the  spring  of 
TABLE  29.—  SPARTA  FIELD 

1925. 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Soybeans 

Series 
200 
Corn 

Series 
300 
Sweet 
clover 

Series 
400 
Wheat 

1 

2 
3 

4 

5 
6 

7 
8 

9 
10 

None  

.    (   -72) 

26.8 
39.2 
53.6 
62.0 

19.2 
23.0 

48.8 
51.4 

66.0 
17.0 

0.00 
0.00 
3.18 
1.98 

0.00 
0.00 
2.27 
2.83 

4.50 
0.00   . 

3.0 
6.7 
20.7 
25.7 

7.8 
8.3 
24.7 
26.5 

22.2 
5.8 

Manure  

.    (   .79) 

Manure,  lime  

.    (1.71) 

Manure,  lime,  rock  phosphate  . 

.    (1.85) 

None       .      .        .          

.    (  .65) 

Residues         .               

.    (  .88) 

Residues,  lime.  .  . 

.    (1.51) 

Residues,  lime,  rock  phosphate  . 

Residues,  lime,  rock  phosphate, 
None  

.    (1.74) 

kainit  . 

.    (1.85) 
.    (1.07) 

170 


BULLETIN  No.  280 


[August, 


TABLE  30.— SPARTA  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series 
500 
Cowpeas 

Series 
600 
Timothy 

Series 
700 
Wheat 

Series 
800 
Corn 

1 
2 
3 

4 

5 
6 

None     .           

.    (1.13) 

(   .46) 
(   .86) 
(1.67) 
(1.76) 

(1.50) 

(   -26) 

10.8 
15.8 

28.3 
38.2 

40.8 
9.2 

15.0 
14.6 
58.2 
68.0 

63.2 
20.6 

Manure  

...    (1.27) 

Manure,  lime  

...    (2.03) 

Manure,  lime,  rock  phosphate  

...    (2.26) 

Manure,  lime,  rock  phosphate,  kainit  . 
None  

.    (2.82) 
...    (1.87) 

TABLE  31.—  SPRING 

VALLEY  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Clover 

Series 
200 
Oats 

Series 
300 
Corn 

Series 
400 
Wheat 

A 
B 

1 
2 
3 
4 

5 
6 

7 
8 

9 
10 

Legumes,  lime,  acid  phosphate  

.    (  .96) 

35.9 
35.0 

43.4 
47.2 
53.1 
61.9 

49.7 
46.9 
48.1 
52.8 

45.3 

37.8 

46.0 
51.0 

45.0 
53.2 
53.4 
59.2 

54.0 
54.8 
59.8 
57.4 

58.6 
53.4 

31.8 
33.3 

33,2 
40.2 
36.8 
44.0 

38.8 
39.8 
40.0 
44.7 

41.8 

38.2 

Legumes,  lime,  rock  phosphate  

.  ..    (  .86) 

None  

.    (1.50) 

M  anure  

...    (1.19) 

Manure,  lime  

...    (1.11) 

Manure,  lime,  rock  phosphate  

.  ..    (1.04) 

None  

.    (1.33) 

Residues  

.  ..    (   .85) 

Residues,  lime  

...    (   .71) 

Residues,  lime,  rock  phosphate  

(     81) 

Residues,  lime,  rock  phosphate,  kainit 
None  

...    (   .78) 
...    (1.11) 

TABLE  32.—  TOLEDO  FIELD 

Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Sweet 
clover 

Series 
200 
Oat  hay 

Series 
300 
Corn 

Series 
400 
Wheat 

1 
2 
3 

4 
5 
6 

7 
8 

9 
10 

None  

0.00 

(   -32) 
(  -39) 
(  -90) 

(   .85) 
(  -17) 
(   .42) 
(   .62) 
(  .97) 

(1-01) 
(  .19) 

26.0 
34.4 

52.8 

52.0 
26.0 
26.6 
40.8 
36.6 

51.0 

22.8 

7.5 
11.8 
25.3 

27.8 
11.5 
18.7 
23.3 
24.0 

33.7 
3.7 

Manure  

...     0.00 

Manure,  lime  

.  .  .     3  .  83 

Manure,  lime,  rock  phosphate  

.  ..     2.95 

None  

...     0.00 

Residues  

...     0.00 

Residues,  lime  

.  ..     3.03 

Residues,  lime,  rock  phosphate  

.  ..     2.15 

Residues,  lime,  rock  phosphate,  kainit 
None  

3.83 
.16 

1926'] 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


171 


TABLE  33.— UNION VILLE  FIELD 


Serial 
plot 
No. 

Soil  treatment 

Series 
100 
Soybeans 

Series 
200 
Seed 
cotton 

Series 
300 
Corn 

Series 
400 
Oats1 

(Ibs.) 

1 

None  .  .  . 

(1 

.74) 

260 

14 

?, 

11 

6 

2 

Manure  . 

(1 

.35) 

450 

16 

0 

13 

1 

3 

Manure, 

lime 

n 

,89) 

620 

31 

4 

22 

8 

4 

Manure, 

lime,  rook  nhosnhate  

(1 

,81) 

700 

?9 

8 

?0 

9 

5 

None.  .  . 

(1 

.00) 

280 

5 

?, 

11 

6 

6 

Residues 

(] 

.19) 

260 

11 

0 

10 

9 

7 

Residues, 

lime. 

(1 

.59) 

310 

39 

6 

17 

5 

8 

Residues, 

lime. 

rock  phosphate  

(] 

,72) 

510 

41 

4 

25 

3 

9 

Residues,  lime, 

rock  phosphate,  kainit  .  . 

(1 

.88) 

780 

42 

.8 

24 

.7 

10 

None  .  .  . 

,  (I 

.00) 

150 

9 

.4 

8 

.1 

*Oats  grown  as  a  substitute  for  wheat. 


TABLE  34.— URBANA,  DAVENPORT  PLOTS:  WEST  HALF 


Serial 
plot 
No. 


Soil  treatment 


Series 
100 
Corn 


Series 

200 

Alfalfa 


Series 

300 

Wheat 


Series 

400 

Clover 


Series 
500 
Oats 


1  None. 

2  Residues 

3  Manure 

4  Residues,  lime 

5  Manure,  lime 

6 

7 
8 


10 


Residues,  lime,  rock  phosphate. 
Manure,  lime,  rock  phosphate.  . 
Residues,  lime,  rock  phosphate, 

potassium  sulfate  ........ 

Manure,  lime,  rock  phosphate, 

potassium  sulfate  ........ 

Manure  x  5,  lime,  rock  phos- 

phate x  5  ............... 


62.6 
55.5 
65.0 
55.8 
66.9 

56.3 
63.0 

58.2 
66.0 
62.0 


(1.98) 
(1.83) 
(1.64) 
(2.51) 
(2.38) 

(4.21) 
(4.31) 

(5.08) 
(5.43) 
(5.78) 


17.7 
15.9 
21.6 
32.0 
41.4 

53.3 
50.0 

48.4 
48.2 
47.2 


.60) 
.50) 
.82) 


(1.10) 
(.98) 

(1.21) 
(1.51) 

(1.57) 
(1.86) 
(1.74) 


36.4 
39.3 

38.8 
38.5 

42.8 

52.0 
49.4 

53.3 
54.3 

64.7 


172 


BULLETIN  No.  280 


{August, 


TABLE  35.— URBANA,  DAVENPORT  PLOTS:  EAST  HALF 


Serial 
plot 
No. 


Soil  treatment 


Series 

100 

Corn 


Series 

200 
Alfalfa 


Series 

300 
Wheat 


Series 

400 
Clover 


Series 
500 

Oats 


1  None 61.8  (1.62)  13.8  (   .80)  39.4 

2  Residues 61.8  (1.63)  16.3  (.85)  35.1 

3  Manure 73.1  (1.68)  26.3  (1.00)  38.4 

4  Residues,  lime 58.3  (2.71)  36.0  (.94)  39.5 

5  Manure.lime 75.8  (2.97)  43.2  (.97)  48.4 

6  Residues,  lime,  bone  meal 58.8  (4.68)  45.8  (1.41)  53.5 

7  Manure,  lime,  bone  meal 73.8  (4.89)  53.5  (1.55)  52.8 

8  Res.,  lime,  bone  meal,  potas.  sulf.  60.8  (4.82)  50.3  (1.56)  57.0 

9  Man.,  lime,  bone  meal,  potas.  sulf.  72.7  (5.23)  47.3  (1.46)  55.4 
10  Manure  x  5,  lime,  bone  meal  x  5.  60.5  (5.65)  46.1  (1.74)  61.9 


TABLE  36.— URBANA,  MORROW  PLOTS 

Plot  3          Plot  4         Plot  5 

Serial  (Continu-   (Corn  and      (Corn, 

plot  Soil  treatment  ous  corn)      oats  ro-    oats,  clover 

No.  Corn          tation)       rotation) 

Corn1  Corn 

NW  None 15.4  25.6  40.2 

SW  Manure,  lime,  rock  phosphate 41.7  39 . 4  57 . 4 

NE  None 22.9  27.8  43.9 

SE  Manure,  lime,  bone  meal 49. 1  39.6  59.9 

'A  sweet-clover  green-manure  crop  is  plowed  down  for  corn  in  addition  to  the 
standard  soil  treatment. 


TABLE  37.— URBANA,  SOUTH  FARM:  NORTHWEST  ROTATION 
(Potatoes,  corn,  soybeans,  alfalfa) 


Serial 
plot                          Soil  treatment 
No. 

Series 
100 
Potatoes 

Series 
200 
Alfalfa1 

Series 
300 
Corn 

Series 
400 
Soybeans 

43  W     Manure,  rock  phosphate.  ..    . 

30  9 

65  8 

33  7 

46W     Manure,  rock  phosphate  .  . 

49  6 

(5  43) 

69  4 

28  8 

49W    Manure  

56.1 

(4.90) 

68.0 

32.9 

50W     Manure.  .... 

.     58  3 

(4  56) 

66  2 

43  4 

53  W     Manure,  rock  phosphate  

61.4 

72.6 

32.1 

56W     Manure,  rock  phosphate  

57.2 

(4.93) 

75.3 

32.3 

43E      Manure,  lime,  rock  phosphate  

26.2 

75.1 

33.7 

46E      Manure,  lime,  rock  phosphate  

42.6 

(5.13) 

75.1 

32.4 

49E      Manure  

59.9 

(4.06) 

75.3 

35.3 

50E      Manure..    .            .          ... 

.    .  .       61  1 

(4  84) 

74  4 

39  0 

53E      Manure,  lime,  rock  phosphate  

53.4 

79.5 

32.1 

56E      Manure,  lime,  rock  phosphate  

53.6 

(4.47) 

83.3 

31.3 

1  Alfalfa  on  Plots  243  and  253  was  cut  at  different  sta,ges  of  growth  than  on  the 
other  plots;  hence  the  yields  are  not  comparable. 


1926] 


CROP  YIELDS  FROM  ILLINOIS  SOIL  EXPERIMENT  FIELDS  IN  1925 


173 


TABLE  38.— URBANA,  SOUTH  FARM:  SOUTHWEST  ROTATION 
(Corn,  oats,  clover,  wheat) 


Serial 
plot                          Soil  treatment 
No. 

Series 
100 
Oats 

Series 
200 
Clover 

Series 
300 

Wheat 

Series 
400 
Corn 

63W 
66W 
69W 
70W 
73W 
76W 

Residues,  rock  phosphate  

39 

,6 
5 
3 
.1 
.1 
,1 

.60 
.33 
.43 
(  -03) 

(   -21) 
(   -21) 

50.4 
49.2 
43.5 
46.0 
48.9 
46.1 

71. 

73. 
64. 
69. 
71 
67. 

1 
0 
0 
0 

8 
6 

Residues,  rock  phosphate  

.      .     40 

Residues  

24, 

Manure  

36 

Manure,  rock  phosphate  

...     43 

Manure,  rock  phosphate  

41 

63E 
66E 
69E 
70E 
73E 
76E 

Residues,  lime,  rock  phosphate  

45 

.1 

.6 
.5 

.7 
.5 
.5 

.61 
.43 

.52 

(   -10) 
(   .23) 
(   -23) 

41 
46 
37 
38 
37 
35 

3 
.3 

,2 
.5 
.8 
,2 

66 
68 
52 
64 
68 
75 

8 
3 
,2 
.9 
.0 
0 

Residues,  lime,  rock  phosphate  

37 

Residues  

26 

Manure  

33 

Manure,  lime,  rock  phosphate  

40 

Manure,  lime,  rock  phosphate  

43 

TABLE  39.— URBANA,  SOUTH  FARM:  NORTH  CENTRAL  ROTATION 
(Corn,  corn,  oats,  clover) 


Serial 
plot                          Soil  treatment 
No. 

Series 
500 
Corn 

Series 
600 
Oats 

Series 
700 
Clover 

Series 
800 
Corn 

43     Residues,  rock  phosphate  

57  6 

39.3 

.52 

58.8 

46     Residues,  rock  phosphate  

58.9 

36  5 

.32 

60.5 

jC  AQ    Residues  

46.4 

18.6 

.43 

51.9 

50     Manure  

57.6 

28.1 

.44 

58.4 

53     Manure,  rock  phosphate  

.    .  .  .     61  0 

44.5 

.49 

68.1 

56     Manure,  rock  phosphate  

59.3 

43.2 

.45 

60.3 

TABLE  40.— URBANA,  SOUTH  FARM:  SOUTH  CENTRAL  ROTATION 
(Corn,  corn,  corn,  soybeans) 


Serial 
plot 
No. 


Soil  treatment 


Series       Series       Series      Series 
500          600          700          800 
Corn        Corn    Soybeans    Corn 


63 
66 
69 


Residues,  rock  phosphate . 
Residues,  rock  phosphate. 
Residues. . 


70     Manure 

73     Manure,  rock  phosphate. 
76     Manure,  rock  phosphate . 


47.7 
48.6 
42.0 

48.1 
54.7 
54.8 


46.4 
40.5 
41.1 

47.1 
44.5 
42.2 


33.2 
31.1 
23.3 

(1.83) 
(2.18) 
(2.14) 


58.5 
64.1 
56.2 

57.6 
58.5 
54.4 


174  BULLETIN  No.  280 

TABLE  41.— WEST  SALEM  FIELD 


Serial 
plot                 Soil  treatment 
No. 

Series 
100 
Corn 

Series 
200 
Wheat2 

Series 
300 
Sweet 
clover 

Series3 
400 
Oats 

Series3 
500 
Soybeans 

1 
2 
3 

4 

5 
6 

7 
8 

9 
10 

None  .  .       .  .                   .    . 

4 
14. 
15. 
15. 

5. 
9. 
9 
10. 

16 

7. 

.4 
9 
1 

8 

8 
2 
3 

7 

9 
4 

20 
20. 
15. 
30. 

11. 
13 
20 
35, 

39 
9. 

.6 

4 

8 
7 

0 
4 
2 
4 

8 
6 

1 
2 
3 

2. 

3 
3 

4 
0 

.19 
05 

83 

78 

17 
75 

00 

08 

50 
00 

3 
23 
33 
36, 

12. 
18, 
29, 
37. 

46 

.3 
4 
3 

,7 

2 
6 
4 
5 

1 

(  .18) 
(   -45) 
(   .52) 
(   -55) 

(    .38) 
(   .40) 
(   .48) 
(   .55) 

(   .55) 

Manure,  lime1  

Manure,  lime  

Manure,  lime,  rock  phosphate  .  . 
Lime1  

Residues,  lime1  

Residues,  lime  

Residues,  lime,  rock  phosphate  . 

Res.,  lime,  rock  phos.,  kainit.  .  . 
None  

initial  application  of  lime  only.   "Plots  1  and  2  receive  the  overwash  from  Plots 
3  and  4.     3There  are  only  9  plots  in  Series  400  and  500. 


UNIVERSITY  OF  ILLINOIS-URBAN* 


